Question

Why does it take a longer time for a kilogram of water than a kilogram of copper to reach the same temperature? ​

Answer 1

Answer:

Since water has a higher specific heat than copper.

Explanation:

Dimensionally speaking, the specific heat of a material ($c$) is represented by:

$[c] = \frac{[Energy]}{[Mass]\cdot [Temperature]}$

The specific heats of water and copper are $4186\,\frac{J}{kg\cdot ^{\circ}C}$ and $390\,\frac{J}{kg\cdot ^{\circ}C}$, respectively. Let suppose that temperature change and masses of water and copper are the same. Then, a kilogram of water takes a longer time than a kilogram of copper since the first has a higher specific heat.